28451450880 has 312 divisors, whose sum is σ = 102290125392. Its totient is φ = 7585726464.

The previous prime is 28451450873. The next prime is 28451450891. The reversal of 28451450880 is 8805415482.

28451450880 is a `hidden beast` number, since 2 + 8 + 4 + 514 + 50 + 8 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4973782 + ... + 4979498.

It is an arithmetic number, because the mean of its divisors is an integer number (327852966).

Almost surely, 2^28451450880 is an apocalyptic number.

28451450880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28451450880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51145062696).

28451450880 is an abundant number, since it is smaller than the sum of its proper divisors (73838674512).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28451450880 is an frugal number, since it uses more digits than its factorization.

28451450880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5761 (or 5727 counting only the distinct ones).

The product of its (nonzero) digits is 409600, while the sum is 45.

The spelling of 28451450880 in words is "twenty-eight billion, four hundred fifty-one million, four hundred fifty thousand, eight hundred eighty".